<?php

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/*

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* This file is part of the Symfony package.

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*

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* (c) Fabien Potencier <fabien@symfony.com>

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*

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* For the full copyright and license information, please view the LICENSE

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* file that was distributed with this source code.

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*/

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namespace Symfony\Polyfill\Php72;

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/**

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* @author Nicolas Grekas <p@tchwork.com>

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* @author Dariusz Rumiński <dariusz.ruminski@gmail.com>

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*

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* @internal

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*/

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final class Php72

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{

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private static $hashMask;

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public static function utf8_encode($s)

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{

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$s .= $s;

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$len = \strlen($s);

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for ($i = $len >> 1, $j = 0; $i < $len; ++$i, ++$j) {

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switch (true) {

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case $s[$i] < "\x80": $s[$j] = $s[$i]; break;

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case $s[$i] < "\xC0": $s[$j] = "\xC2"; $s[++$j] = $s[$i]; break;

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default: $s[$j] = "\xC3"; $s[++$j] = \chr(\ord($s[$i]) - 64); break;

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}

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}

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return substr($s, 0, $j);

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}

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public static function utf8_decode($s)

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{

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$s = (string) $s;

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$len = \strlen($s);

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for ($i = 0, $j = 0; $i < $len; ++$i, ++$j) {

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switch ($s[$i] & "\xF0") {

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case "\xC0":

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case "\xD0":

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$c = (\ord($s[$i] & "\x1F") << 6) | \ord($s[++$i] & "\x3F");

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$s[$j] = $c < 256 ? \chr($c) : '?';

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break;

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case "\xF0":

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++$i;

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// no break

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case "\xE0":

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$s[$j] = '?';

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$i += 2;

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break;

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default:

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$s[$j] = $s[$i];

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}

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}

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return substr($s, 0, $j);

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}

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public static function php_os_family()

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{

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if ('\\' === \DIRECTORY_SEPARATOR) {

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return 'Windows';

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}

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$map = array(

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'Darwin' => 'Darwin',

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'DragonFly' => 'BSD',

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'FreeBSD' => 'BSD',

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'NetBSD' => 'BSD',

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'OpenBSD' => 'BSD',

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'Linux' => 'Linux',

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'SunOS' => 'Solaris',

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);

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return isset($map[PHP_OS]) ? $map[PHP_OS] : 'Unknown';

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}

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public static function spl_object_id($object)

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{

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if (null === self::$hashMask) {

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self::initHashMask();

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}

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if (null === $hash = spl_object_hash($object)) {

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return;

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}

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// On 32-bit systems, PHP_INT_SIZE is 4,

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return self::$hashMask ^ hexdec(substr($hash, 16 - (\PHP_INT_SIZE * 2 - 1), (\PHP_INT_SIZE * 2 - 1)));

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}

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public static function sapi_windows_vt100_support($stream, $enable = null)

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{

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if (!\is_resource($stream)) {

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trigger_error('sapi_windows_vt100_support() expects parameter 1 to be resource, '.\gettype($stream).' given', E_USER_WARNING);

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return false;

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}

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$meta = stream_get_meta_data($stream);

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if ('STDIO' !== $meta['stream_type']) {

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trigger_error('sapi_windows_vt100_support() was not able to analyze the specified stream', E_USER_WARNING);

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return false;

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}

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// We cannot actually disable vt100 support if it is set

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if (false === $enable || !self::stream_isatty($stream)) {

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return false;

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}

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// The native function does not apply to stdin

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$meta = array_map('strtolower', $meta);

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$stdin = 'php://stdin' === $meta['uri'] || 'php://fd/0' === $meta['uri'];

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return !$stdin

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&& (false !== getenv('ANSICON')

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|| 'ON' === getenv('ConEmuANSI')

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|| 'xterm' === getenv('TERM')

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|| 'Hyper' === getenv('TERM_PROGRAM'));

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}

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public static function stream_isatty($stream)

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{

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if (!\is_resource($stream)) {

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trigger_error('stream_isatty() expects parameter 1 to be resource, '.\gettype($stream).' given', E_USER_WARNING);

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return false;

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}

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if ('\\' === \DIRECTORY_SEPARATOR) {

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$stat = @fstat($stream);

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// Check if formatted mode is S_IFCHR

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return $stat ? 0020000 === ($stat['mode'] & 0170000) : false;

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}

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return \function_exists('posix_isatty') && @posix_isatty($stream);

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}

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private static function initHashMask()

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{

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$obj = (object) array();

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self::$hashMask = -1;

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// check if we are nested in an output buffering handler to prevent a fatal error with ob_start() below

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$obFuncs = array('ob_clean', 'ob_end_clean', 'ob_flush', 'ob_end_flush', 'ob_get_contents', 'ob_get_flush');

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foreach (debug_backtrace(\PHP_VERSION_ID >= 50400 ? DEBUG_BACKTRACE_IGNORE_ARGS : false) as $frame) {

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if (isset($frame['function'][0]) && !isset($frame['class']) && 'o' === $frame['function'][0] && \in_array($frame['function'], $obFuncs)) {

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$frame['line'] = 0;

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break;

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}

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}

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if (!empty($frame['line'])) {

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ob_start();

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debug_zval_dump($obj);

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self::$hashMask = (int) substr(ob_get_clean(), 17);

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}

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self::$hashMask ^= hexdec(substr(spl_object_hash($obj), 16 - (\PHP_INT_SIZE * 2 - 1), (\PHP_INT_SIZE * 2 - 1)));

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}

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public static function mb_chr($code, $encoding = null)

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{

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if (0x80 > $code %= 0x200000) {

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$s = \chr($code);

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} elseif (0x800 > $code) {

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$s = \chr(0xC0 | $code >> 6).\chr(0x80 | $code & 0x3F);

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} elseif (0x10000 > $code) {

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$s = \chr(0xE0 | $code >> 12).\chr(0x80 | $code >> 6 & 0x3F).\chr(0x80 | $code & 0x3F);

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} else {

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$s = \chr(0xF0 | $code >> 18).\chr(0x80 | $code >> 12 & 0x3F).\chr(0x80 | $code >> 6 & 0x3F).\chr(0x80 | $code & 0x3F);

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}

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if ('UTF-8' !== $encoding) {

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$s = mb_convert_encoding($s, $encoding, 'UTF-8');

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}

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return $s;

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}

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public static function mb_ord($s, $encoding = null)

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{

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if (null === $encoding) {

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$s = mb_convert_encoding($s, 'UTF-8');

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} elseif ('UTF-8' !== $encoding) {

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$s = mb_convert_encoding($s, 'UTF-8', $encoding);

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}

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if (1 === \strlen($s)) {

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return \ord($s);

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}

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$code = ($s = unpack('C*', substr($s, 0, 4))) ? $s[1] : 0;

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if (0xF0 <= $code) {

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return (($code - 0xF0) << 18) + (($s[2] - 0x80) << 12) + (($s[3] - 0x80) << 6) + $s[4] - 0x80;

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}

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if (0xE0 <= $code) {

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return (($code - 0xE0) << 12) + (($s[2] - 0x80) << 6) + $s[3] - 0x80;

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}

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if (0xC0 <= $code) {

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return (($code - 0xC0) << 6) + $s[2] - 0x80;

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}

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return $code;

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}

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}

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